Wrench



S. N. HOLM.

WRENCH.

APPucAloN min ocT. l. 1913.

1. ,1 93, 1 Patented Aug. 1, 1916.

SVEN N. HOLM, lOIE' DORCHSTER, MASSACHUSETTS.

WRENCH.

Appli-cation filed October 1, 1913.

To all whom t may concern Be it known that l, SVEN N. HoLM, a citizen ofthe United States, residing at Dorchester, county of Suffolk,Commonwealth of Massachusetts, have invented certain new andA usefulImprovements in Wrenches, of w-hich the following is a speciiication.

This invention relates to Wrenches and particularly to a pipe Wrench.

My invention involves a radical departure from and an improvement overexisting devices of thisclass.

The object of my invention is to provide a wrench capable of manufactureat a reasonable cost, and embodying these essential characteristics,ease and simplicity of adjustment, perfect control of the grip andrelease of the jaws and great durability and strength.

In my present invention I employ two pivoted levers having integrallyformed pipe jaws and a sliding member adjustably embracing one lever andpivoted tothe oo operating lever. This construction enables me to get aneasy and quick adjustment and provides for perfect control of the gripand release of the jaws.

The construction and principle of my invention will be more fullydisclosed in the speciiication which follows; and in the drawings whichform a part of that specification I have shown as anillustrativeembodiment a construction which not only clearly illustrates myinvention but is in itself a form proven to be of the greatest utilityin practical use.

Throughout specification and drawings like numerals of reference arecorrespondingly applied.

lin the drawings: Figure 1 is a side elevation of a wrench in accordancewith my invention. Fig. 2 is a plan view thereof. Fig.

3 is a partial section on the line 3-3 of Fig. l

2. Fig. 4 is a cross section on the line 4 4 of Fig. 1, and Fig. 5 is anenlargeddetail view illustrating particularly the action of the bearinglugs or dogs which form an important feature of my invention.

The wrench thus illustrated comprises a pair of uncrossed levers 1 and2, the lever 1 being regarded as the fixed member and the lever 2 as therelatively movable member.

The lever 1 has a smooth handle portion 3 at one end and has an externalscrew thread 4 cut thereon for a part of its length.

i Specification of Letters Patent.

Patented ang. i, raie.

Serial No. 792,699.

Above this thread the lever is longitudinally enlarged and terminates inan approximately horizontally disposed jaw 5, the inner face of whichhas inwardly pointed serrations 6. This enlarged portion of the `leverhas an elongated slot 7 in which is guided and works across member 8heldl in said slot externally thereof by a transverse pin 9. At this endthe member S has a sliding engagement with the back of the lever 1. Thepin 9 is journaled at its ends in two rounded bearing lugs or dogs 10loose on ,said pin so as to turn under the rocking movement of thelever'2.

The under faces of the lugs are flattened to provide a constantly fiatbearing on the top face of the lever 1 on both sides of the slot,irrespective of the position of the lever (see Fig. 5). Thisconstruction also permits the lugs to slide freely along the lever whenthe coperating lever 2 is moved back and forth relative to the lever 1.

The other end of the cross member 8 is fastened to a pivot pin l1 nearthe upper end of the opposite lever 2. This lever terminates in a jawy12 opposite to and cooperating with the jaw 5 and similarly providedwith serrations 13. Said lever is enlarged at 14 similarly to the lever1 and has its remaining portion formed as a smooth handle 15 cooperatingwith the handle 3.

That part of the metal of the lever 2 adjacent the pivot pin 11 is cutout on each side' to-provide somewhat circular recesses 16 which receivethe free ends of the substantially horizontal arms 17 of a slidingmember 18 adjustable along the lever 1 for the lengthof the slot 7 by arelatively sliding movement thereon and normally lying in substantialparallelism with the lever 1. The pin 11 fastens the arms 17 to thelever 2.

The sides ofthe lever 1 adjacent to the ing opening of the jaws and thusof the rocking member, within the limits of the 'Y slot 7 ,is effectedby a milled feed nut 22 internally threaded to correspond to theVthrough the slot and link connection therewith. In this movement thesliding member as a whole slides along the lever 1 within the limits ofthe slot 7 Its travel, however, maybe regulated within the limits ofsaid slot bythe adjusting nut V22, which, therefore controls the degreeof separation of the jaws 5V and 12. When the proper adjustment has beenfound the lever 2 is moved toward and Vaway from the lever' 1- (see Fig.3). This relative'movement of the levers is permitted through thesliding member. j

In' Voperation in order to turn a pipe or other object itV is necessaryto move the wrench as a whole, the movement of the handles toward orfromfeach other` serving simply to grip orrelease the pipe on theyWorking or return stroke.

Various modications in the form and construction of my wrench mayobviously be resorted to within the limits of the appended claims.

"f' What I therefore claim and desire to secure by Letters Patent is: 1.Ina wrench, a pair of relatively movj able levers,a connection fixed toone of said levers and having a sliding engagement with the cooperatinglever, and means adjustable along one of said levers and pivotallyconnected with the other lever by the same fastening which fixes theconnection to said leverand effectively disposed to control the'position of said connection relative to said levers whereby to hold theadjustment of 4said levers.

2. In awrench, a pair of relatively movi able levers, a connection heldto one of said rlevers and having a sliding engagement with thecooperating lever permitting adjustment of said levers by relativesliding movement thereof, and a member pivoted to one of said 'leversand slidable on the coperating lever and having engagement with the freeend of said. connection to control the effective positioning of saidconnection and thereby hold l the adjustment of said levers.

5. In a..wrench, a pair of levers having gripping jaws, a connectionbetween said levers permitting relative adjustment 0f said jjaws towardand from each other and a member pivotally connectedto one of saidlevers by the same fastening which fixes said connection to said leverand slidably engaging the other lever, said member having connection tobe varied.

engagement with the free end of said connection to. control theeffective positioning of said connection and thereby hold the adjustment of said levers, and said member adjustable toward and from saidconnection to permit the effective positioning of said 4. In a wrench apair of levers having gripping jaws and one lever having a slot, aconnection held tothe other lever and working in the slot of saidslotted lever, whereby said levers may be adjusted by simple slidingmovement of one relative to the other, and a member pivotally connectedwith one of the levers and slidably engaging the other of said leversand effectively disposed to control the position of the connection insaid slot whereby to hold the adjustment of the levers.

V5. In a wrench a pair of levers having 'gripping jaws and one leverhaving a slot, a connection held to the other lever and working in theslot of said slotted lever, whereby said levers may be adjusted bysimple sliding movement of one relative to the otheigand a memberpivotally connected with one of the levers and slidably engag-l ing theother of said levers and effectively disposed to control the position ofthe connection in said slot whereby to hold the adjustment of thelevers, and means on said connection for limiting the motions of saidmember.

6. In a wrench, a pair of levers having gripping jaws, one lever havinga slot, a connection held to the other lever and received in said slotand permitting adjustment of said levers relatively to each other, a pinthrough the free end of said connection, a pair of bearing devices onsaid pin having constantly flat bearing on the edges of said slottedlever on each side of the slot therein, and means pivotally connected toVsaid unslotted lever and slidable on said slotted lever for controllingthe effective positioning of said connection in said slot whereby tohold the adjustment of said levers.

7. A wrench of the class described comprising a pair of uncrossed leverseach having a jaw at one end and one of said levers having a slottherein, a member pivoted to one of said levers and slidably embracingthe cooperating lever, means for controlling the effective dispositionof said member, a cross member held to one of said levers and Vguided insaid slot of the coperating lever a pin moya-bly fastening the free endof said cross member in said slot, and lugs loose on 15 said pin andhaving flattened bearing faces arranged to slide freely along the faceof said lever on each side of said slot and to maintain a constantlyflat bearing on said lever irrespective of its Working position.

In testimony whereof I aiiX my signature in presence of two Witnesses.

SVEN N. HOLM.

Witnesses:

IDA S. CLEMENT, GEO. B. RAWLINGS.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

